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acoelomate

American  
[ey-see-luh-meyt, ey-see-loh-mit] / eɪˈsi ləˌmeɪt, ˌeɪ siˈloʊ mɪt /

adjective

  1. Also acoelomatous acoelomous. having no coelum.

noun

  1. any organism that lacks a cavity between the body wall and the digestive tract, including the flatworms, nemertines, and sea anemones.

Etymology

Origin of acoelomate

First recorded in 1875–80; a- 6 + coelomate

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Example Sentences

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The flatworms are acoelomate organisms that include free-living and parasitic forms.

From Textbooks • Apr. 25, 2013

The flatworms are acoelomate, so their bodies contain no cavities or spaces between the outer surface and the inner digestive tract.

From Textbooks • Apr. 25, 2013

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.